February 4, 1993 RM Dallas Semiconductor
Programmable delay lines allow post-production timing adjustments
Delay increments as small as 0.25 ns allow use with fiber optics
A pair of monolithic timing circuits allows circuit-board construction to
go ahead before all timing details are worked out. The circuits also allow
a small inventory to take the place of many custom delay lines. They even
allow adjustment of a backplane whenever a new board is added. The DS1020
has a single output in 256 steps of 0.25, 0.5, 1, or 2 ns. The DS1045 has
one input with two outputs. The outputs can be independently programmed in
16 steps of 3, 4, or 5 ns. Programming is by a standard microprocessor
interface, but the devices can also be hard wired. (DS1020, DIP, $13 ea/1,
000; SOIC $13.10 ea/1,000; DS1045 DIP $11.55 ea/1,000, SOIC $11.65–stock.
) Dallas Semiconductor Dallas, TX Ed Ely 214-450-0448 Fax
These delay elements from Dallas Semiconductor can be programmed in the
system through a standard microprocessor interface or hardwired.